Notes

I attempted to use Alpine Linux as a proof-of-usability, since it's the hip
new kid on the containerization block [1], but as it turns out Alpine's
Firefox package is pretty fucked [2].

I use dmenu, this means I can run ff-docker from my desktop without
opening a terminal, effectively making it a super-private-yet-convenient
drop-in for Firefox. Pretty neat right?

Conclusion

This was pretty simple but effective in terms of giving me the option to have
more privacy. I can see it being extended to add even more security; e.g.,
routing all of the traffic in the container through a VPN would be easy enough.
Food for thought [citation needed].